I've created a few password protected sites that register a session variable once someone has logged in successfully. On all internal pages, there is a check to make sure the session variable is set, otherwise the user is bumped back to the login page. the login pages destroy any previous sessions, and this is the only place where sessions are destroyed. However, sometimes when I am browsing between internal pages I am randomly bumped back to the login page. This can happen within 2 minutes after logging in, although sessions are not set to expire for half an hour. I've confirmed that my session has been destroyed by looking at the session files. Any ideas what could be causing this? I am using PHP 4.0.6 on a windows NT server. Thanks
-Lila